Why do you think Secular Humanists don't think they belong to a group nor view themselves as religious?

This is really weird to me. the definition of religion is 'a cause, principle, or system of beliefs held to with ardor and faith.' The believers of Secular Humanism are everywhere, and their written dogma is prolific, especially since the advent of the Internet. Their god is Reason, with the umption that humans possess the ability to know everything there is to know. MANY of them are zealots, attacking especially people of Christian faith as though it is their duty to do so. They are usually brash, confrontational, angry, and stubbornly hold onto their beliefs just as strongly as other religious people, seeing and hearing only what they want to. Cynicism and its expression represents one of their core beliefs. They control our public school systems, primarily through the teaching of evolution and the spontaneous (random) beginning of life, even though it's totally unproven. So, to say they are not organized would be absurd, especially since they have originators of the belief system who explicitly set out their agenda for gaining control of society. Some of them may not know who those individuals are, but that is no different from individuals who believe in Christianity without ever hearing much about Christ from church or formal teaching. No doubt, several of them who regularly monitor this forum for opportunities to evangelize will reply to this question, but will present themselves as 'independent thinkers' with no regard to the fact that their belief system is more deeply rooted and cohesive than that of any other religion. What do YOU think?